Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
The most common minerals on earthMineral PhotographyThe Elements and their Minerals
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Rhodizite

This page is currently not sponsored. Click here to sponsor this page.
Formula:
(K,Cs)Al4Be4(B,Be)12O28
Colour:
Colourless, white, greyish, yellowish; colourless in transmitted light
Lustre:
Adamantine, Vitreous
Hardness:
8
Specific Gravity:
3.305 - 3.38
Crystal System:
Isometric
Name:
From the Greek, "rhodizein," = "to be rose-coloured" in allusion to its property of turning a blowpipe flame rose-red. Do not confuse with Rhodesite.
The potassium analogue of Londonite. Londonite-Rhodizite Series.

First described by Rose in 1834 without quantitative chemical data. A chemical analysis was made by Damour (1882) but later showed to be incomplete, lacking both Li and Be. The alkali metals were also not separated in the analysis. Pekov et al (2010) re-analyzed co-type specimens of rhodizite from Sarapulsk and Shaitanka, Russia and found all to be Cs-dominant (Cs > K) and thus londonite according to IMA nomenclature. No rhodizite has been verified from the co-type localities. However, K-dominant members of the londonite-rhodizite series have been noted from Madagascar.
Note: Both K-dominant and Cs-dominant samples from Madagascar prior to the description of londonite (The Cs-dominant member of the londonite-rhodizite series) by Simmons et al (2001) have been described as rhodizite in the literature.
NOTE:
Specimens from Madagascar without analysis should be labeled as londonite-rhodizite series. Many crystals contain complex patchy zones of londonite and rhodizite which are only visible by back-scattered electron imaging.

Visit gemdat.org for gemological information about Rhodizite.


Hide all sections | Show all sections

Classification of RhodiziteHide

Approved, 'Grandfathered' (first described prior to 1959)
6.GC.05

6 : BORATES
G : Heptaborates and other megaborates
C : Tekto-dodecaborates
25.8.2.1

25 : ANHYDROUS BORATES CONTAINING HYDROXYL OR HALOGEN
8 : Miscellaneous
9.1.16

9 : Borates
1 : Borates of the alkalis and boric acid

Physical Properties of RhodiziteHide

Adamantine, Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, white, greyish, yellowish; colourless in transmitted light
Hardness:
Cleavage:
Distinct/Good
On {111} and {1¯11}, difficult.
Fracture:
Conchoidal
Density:
3.305 - 3.38 g/cm3 (Measured)    3.24 g/cm3 (Calculated)

Optical Data of RhodiziteHide

Type:
Isotropic
Comments:
Exhibits weak anomalous double refraction distributed in sectors with Z(+) inclined about 10° to [110].

Chemical Properties of RhodiziteHide

Formula:
(K,Cs)Al4Be4(B,Be)12O28
IMA Formula:
KBe4Al4(B11Be)O28
Common Impurities:
Rb,Na,K

Crystallography of RhodiziteHide

Crystal System:
Isometric
Class (H-M):
4 3m - Hextetrahedral
Space Group:
P4 3m
Cell Parameters:
a = 7.31 Å
Unit Cell V:
390.62 ų (Calculated from Unit Cell)
Morphology:
Crystals dodecahedral, also tetrahedral. "o" usually smooth and shining and "d" frequently uneven.

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of RhodiziteHide

Synonyms of RhodiziteHide

Other Language Names for RhodiziteHide

Relationship of Rhodizite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Rubellite22 photos of Rhodizite associated with Rubellite on mindat.org.
Tourmaline15 photos of Rhodizite associated with Tourmaline on mindat.org.
Quartz6 photos of Rhodizite associated with Quartz on mindat.org.
Elbaite5 photos of Rhodizite associated with Elbaite on mindat.org.
Albite5 photos of Rhodizite associated with Albite on mindat.org.
Danburite3 photos of Rhodizite associated with Danburite on mindat.org.
Columbite-(Mn)2 photos of Rhodizite associated with Columbite-(Mn) on mindat.org.
Béhierite2 photos of Rhodizite associated with Béhierite on mindat.org.
Pseudocubic Quartz1 photo of Rhodizite associated with Pseudocubic Quartz on mindat.org.
Elbaite-Liddicoatite Series1 photo of Rhodizite associated with Elbaite-Liddicoatite Series on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.GC.05Londonite(Cs,K,Rb)Al4Be4(B,Be)12O28Iso. 4 3m : P4 3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.1.1SassoliteH3BO3Tric. 1 : P1
9.1.2MetaboriteHBO2Iso.
9.1.3DiomigniteLi2[B4O7]Tet.
9.1.4BiringucciteNa2B5O8(OH) · H2OMon.
9.1.5NasiniteNa2[B5O8(OH)] · 2H2OOrth.
9.1.6KerniteNa2[B4O6(OH)2] · 3H2OMon. 2/m : P2/b
9.1.7EzcurriteNa4B10O17 · 7H2OTric. 1 : P1
9.1.8TincalconiteNa2(B4O7) · 5H2OTrig. 3 2 : R3 2
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
9.1.10AmeghiniteNa(H4B3O7)Mon.
9.1.11SborgiteNa[B5O6(OH)4] · 3H2OMon.
9.1.12AristarainiteNa2MgB12O20 · 8H2OMon. 2/m : P21/b
9.1.13SantiteK[B5O6(OH)4] · 2H2OOrth.
9.1.14Larderellite(NH4)B5O7(OH)2 · H2OMon.
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2OMon. 2/m : B2/b

Fluorescence of RhodiziteHide

Other InformationHide

Electrical:
Pyroelectric.
Notes:
Insoluble in acids.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for RhodiziteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rose, G. (1834): Über den Rhodizit, eine neue Mineralgattung. Poggendorf’s Annalen der Physik und Chemie. 33, 253-256.
Rose, G. (1835): On rhodizite, a new mineral. Gornyi Zh., kn. 2, 383-388 (in Russian)
Rose, G. (1836): Fernere Bemerkungen über den Rhodizit. Pem>Poggendorf’s Annalen der Physik und Chemie. 39, 321-323.
Ries and Rose (1843) Annalen der Physik, Halle, Leipzig: 59: 353.
Bertrand (1882) Bulletin de la Société française de Minéralogie: 5: 31, 72.
Damour, A. (1882): Sur la rhodizite. Bulletin de la Société française de Minéralogie. 5, 98-103.
Klein (1891) Neues Jahrbuch für Mineralogie, Geologie und Paleontologie, Heidelberg, Stuttgart: I: 65.
Pisani (1910) Bulletin de la Société française de Minéralogie: 33: 37.
Dupare, Wunder, and Sabot (1911) Bulletin de la Société française de Minéralogie: 34: 131.
Goldschmidt, V. (1922) Atlas der Krystallformen. 9 volumes, atlas, and text, vol. 7: 123.
Strunz (1938) Doctoral dissertation.
Strunz (1943) Naturwissenschaften: 31, No. 5.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged: 329-330.
American Mineralogist (1966): 51: 533-534.
Pring, A., V.K. Din, D.A. Jefferson, D.A., J.M. Thomas (1986) The crystal chemistry of rhodizite: a re-examination. Mineral. Mag.: 50: 163-172.
American Mineralogist (1987): 72: 1028.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Simmons, W.B., F. Pezzotta, A.U. Falster, and K.L. Webber (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist (2001): 39: 747-755.
Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254

Internet Links for RhodiziteHide

Localities for RhodiziteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Madagascar
 
  • Antananarivo Province
    • Analamanga Region
Arthur Thomas, Gemstones (2009), p. 48
    • Vakinankaratra Region
      • Betafo District
        • Andrembesoa Commune
          • FKT Antsentsindrano
Behier, J. (1963): Carte mineralogique de Madagascar. Archive Service Géologique Madagascar. A 1871; [Eur.J.Min 13:159-165]; Handbook of Mineralogy (http://www.handbookofmineralogy.org/pdfs/rhodizite.pdf)
          • Tetezantsio-Andoabatokely Pegmatite Field
Knut Edvard Larsen Collection # M-710
Knut Edv.Larsen collection / Laurs, B. M.; Pezzotta, F.; Simmons, W.; Falster, A. U & Muhlmeister, S. (2002): Rhodizite-londonite from the Antsongombato pegmatite, Central Madagascar. Gems & Mineralogy. 38 (4), 326-339
      • Sahatany Pegmatite Field (Mt Ibity area)
        • Manandona Valley
Lacroix, A. (1922): Mineralogie de Madagascar, Tome I. Géologie-Minéralogie descriptive. A.Challamel (Éditeur), Paris. 624p ; Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 330; Canadian Mineralogist (2001): 39: 747-755.
Pezzotta F., Falster A. U., Simmons, Wm.B. & Webber, K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.: Simmons, W.B., F. Pezzotta, A.U. Falster, and K.L. Webber (2001) Londonite, a new mineral species: the Cs-dominant analogue of rhodizite from the Antandrokomby granitic pegmatite, Madagascar. Canadian Mineralogist (2001): 39: 747-755.
Pezzotta F., Falster A. U., Simmons, Wm.B. & Webber, K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
        • Sahatany Valley
Larsen, K. E. (2003): Mineralene i Sahatany pegmatittfelt, Madagaskar. Norsk Bergverksmuseums Skrift. 25, 5-18(in norwegian)
Lacroix, A. (1912): Sur quelques minéraux des pegmatites du Vakinankaratra (Madagascar). Bulletin de la Société française de Minéralogie, Paris 35 , 76-84
  • Fianarantsoa Province
    • Amoron'i Mania Region
      • Ambatofinandrahana District
        • Fenoarivo Commune
Behier, J. (1960): Contribution á la mineralogie de Madagascar. Annales Géologiques de Madagascar XXIX, Tananarive. p. 56
      • Ambositra District
        • Sahatsiho-Ambohimanjaka Commune
Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.; Canadian Mineralogist Volume 39, Number 3, June 2001, 747-755:
Pezzotta F., Falster A.U., Simmons W.B. & Webber K.L. (1997): Rhodizite from Madagascar, new localities and new chemical data. Abstracts of the First International Workshop on Petrology, Milan, Italy, September 11 to 13, 1997, Mus. Storia Nat. Sc. Nat.
Pezzotta F., Falster A. U., Simmons W. B., Webber K. L. (1998): New data on rhodizite from Madagascar. 17th General Meeting of the International Mineralogical Association, Abstracts & Programme, August 9-14, Toronto, Canada, p. A153; Madagaskar, extraLapis No. 17, pages 66-68 / Canadian Mineralogist Volume 39, Number 3, June 2001, 747-755
  • Tuléar Province (Toliara)
    • Anosy Region (Fort Dauphin Region)
      • Amboasary District
        • Tranomaro Commune
Behier, J.(1960): Contribution á la mineralogie de Madagascar. Ann.Geol. Mad. XXIX, p 56/ http://www.minsocam.org/MSA/Special/Pig/PIG_articles/Anjahamiary.pdf
Russia (TL)
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Rezh District
          • Shaitanka District
Pekov,I. (1998): Minerals first discovered on the territory of the former Soviet Union, p. 174; Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254
        • Sarapulka District (Murzinka)
Pekov,I. (1998): Minerals first discovered on the territory of the former Soviet Union, p. 174; Pekov, I. V., Yakubovich, O.V., Massa, W., Chukanov, N. V., Kononkova, N.N., Agakhanov, A. A. & Karpenko, V. Y. (2010): Londonite from the Urals, and new aspects of the crystal chemistry of the rhodizite-londonite series. Canadian Mineralogist. 48: 241-254
UK
 
  • England
    • Devon
      • Okehampton area (Northern Dartmoor)
http://www.mindat.org/mesg-7-92300.html; http://johnblanchard.net/index.php/some-sites/226-meldon-aplite-quarry-sssi; American Mineralogist 58, p 374.; von Knorring, O. and Condliffe, E. (1984) On the occurrence of niobium-tantalum and other rare-element minerals in the Meldon aplite, Devonshire. Mineralogical Magazine, vol. 48, n° 348, 443-448 (referring to Kingsbury).
USA
 
  • Wisconsin
    • Florence Co.
      • Fern
        • Pine River pegmatites
Falster, A. , W.B. Simmons & P.B. Moore (1996) The mineralogy and geochemistry of the Animikie Red Ace pegmatite in Florence County, Wisconsin: Recent Research Developments in Mineralogy: 1: 7-67.
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: December 16, 2017 09:16:27 Page generated: November 21, 2017 01:18:22
Go to top of page